Wrist-pin



Patented 1an. 3|, |899. s. F. FIELD & .1. PALMER.

WRIST PIN.

(Application tiled July 20, 1898.)

` specification.

NTTED STATES PATENT OFFICE.

SAMUEL FIELD AND JUDSON PALMER, AOF FINDLAY, OHIO.

WRIST-PIN.

SPECIFICATION forming part of Letters Patent N o. 618,655, dated January 31, 1899.

Application ledJnly Z0, 1898. Serial No. 686,465. (No model.)

To tif/ZZ whom t patty concern:

Be it known that we, SAMUEL F. FIELD and JUDsoN PALMEE,citizens of the United States, residing at Findlay, in the county of Hancock and State of Ohio, have invented a new and useful Wist-Pin, of which the following is a Our invention relates to wrist-pins, and has for its object to provide a simple, efficient, and durable wrist-pin and stub-bearin g adapted for use in connection with engine-crank pins, eccentric-rod pins, and'cross-head and link pins in all kinds of machinery, the journal box or brass being adjustable with relation to the stub-head or other oscillatory member to take up lost motion due to wear of the box or brass or of the wrist-pin.

Further objects and advantages of this invention will appear in the following description, and the novel features thereof will be particularly pointed out in the appended claims.

In the drawings, Figure 1 is a perspective view of a wrist-pin and connection constructed in accordance with our invention. Fig. 2 is a sectional view taken longitudinally of the stub-head. Fig. 3 is a section taken parallel with and in the plane of the axis of the Wristpin. Fig. 4 is a detail view in perspective of the sleeve forming the journal box or brass. Fig. 5 is a similar view of the collar. Fig. G is a detail sectional view of a portion of the sleeve to show the parallel bored outer end thereof.

Similar numerals of referenceindicate corresponding parts in all the figures of the drawings.

In order that the construction, operation, and advantages of ourinvention may be fully understood, we have shown the same in connection with the Wrist-pin 1 of a crank-disk 2, 3 representing a portion of a connectingrod or other analogous part of machinery, having a stub-head 4, which is mounted revolubly upon the wrist-pin. The stub-head is split longitudinally to communicate with the parallel bore 5 therein, said bore forming a seat for a sleeve 6, which constitutes a journal box or brass. This sleeve is exteriorly cylindrical to snugly fit in the seat of the stubhead, whereupon -the tightening of the bolt r, by which the members of the bifurcation are connected, will lock the sleeve at the desired axial adjustment.' This enables us to vary the position of the sleeve with relation to the stub-head, for a purpose hereinafter explained. `Also, in order to prevent movement of the sleeve independently of the seat in the stub-head, an interlocking sliding connection is formed therebetween, as by grooving the sleeve exteriorly at 8 to receive a feather 9 in the seat.

The wrist-pin consists of a bearing portion 2, which is tapered, and the bore of the sleeve is correspondingly tapered to Vit thereon, whereby lost motion between the bore of the sleeve and the wrist-pin may be taken up by the axial adjustment of the sleeve. The outer portion of the wrist-pin is reduced and threaded to receive the main and jam nuts 10 and 11 and the collar 12, the latter having an interlocking connection with -said wrist-pin to prevent independent movement of the former, such interlocking'connection in the construe tion illustrated consisting of a feather or pin 13 von the collar fitting in a groove 14 in the pin. The sleeve or brass is provided with an oil-hole 15, which registers with a corresponding hole 16 in the side of the stub-head.

From the above description it will be seen that while the tapered bore of the sleeve ts the tapered surface of the Wrist-pin to provide for taking up Wear the parallel or cylindrical exterior surface of the sleeve adapts it to be adj usted axially through the seat of the stub-head to take up lost motion without affecting the alinement of the connecting-link, pitman, or other member carrying the stubhead or of which the stub-head forms a part. rlhus to adjust the bearing embodying our invention it is necessary simply to loosen the bolt by which the members of the stub-head are connected to release the sleeve and then tighten the nuts to secure a snug fitting of the sleeve upon the wrist-pin, whereupon the tightening of said bolt will again restore the parts to their operative condition without varying the position of the pitman with relation to the plane of the crank-disk.

A further feature of construction in connection with the sleeve consists in a cylindrical portion 17 at the outer end of the bore thereof or that portion which projects beyond the extremity of the tapered portion of IOO the wrist-pin when the parts are first constructed. The object of this cylindrical portion of the bore is to avoid shouldering the interior of the sleeve by reason of the wearing thereof, and thus subsequently interfering with the accurate adjustment of the sleeve with relation to the Wrist-pin.

The advantages of the device embodying ourinvcntion will be apparent to those skilled it the art, and it will be understood that various changes in the form, proportion, and the minor details of construction may be resorted to Without departing` from the spirit or sacrificin g any of the advantages of this invention.

Having described our invention, what we claim is- 1. The combination with a Wrist-pin having a tapered body portion, of a stub-head having an axially-transverse seat, a sleeve fitted in said seat for axial adjustment and having a tapered bore to receive said body portion of the Wrist-pin, means for locking the sleeve in its adjusted positions in the seat of the stub-head, and locking devices for securing the sleeve at the desired adjustment with relation to the Wrist-pin, substantially as Specified.

2. The combination with a Wrist-pin having a tapered body portion, of a stub-head having a seat, asleeve fitted in said seat for axial adjustment, and having a bore tapered to fit the body portion of the Wrist-pin, the outer reduced end of said tapered bore, beyond the extremity of the body portion of the Wristpin, being cylindrical, means for securing the sleeve at the desired axial adjustment in the stub-head, and locking devices for securing the sleeve at the desired adjustment with relation to the Wrist-pin, substantially as specified.

3. The combination With a Wrist-pin having a tapered body portion, of a stub-head having a transversely-contractible cylindrical seat, means for contracting said seat, an exteriorly-cylindrical sleeve fitted in said seat for axial adjustment, and having a tapered bore to fit said body portion of the Wrist-pin, and means for securing the sleeve at the desired axial adjustment upon the wrist-pin, substantially as specified.

4. The combination with a Wrist-pin having a tapered body portion, of a stub-head having a cylindrical seat, and also having a split in communication with said seat, a transverse bolt connecting the members of the stubhead to contract the seat, an exteriorly-cylindrical sleeve fitted in said seat for axial adjustment and having an interlocking sliding connection therewith, said sleeve also having a tapered bore to iit said body portion of the Wrist-pin and means secured to the Wrist-pin, beyond the outer end of the sleeve, for securing the latter at the desired axial adjustment with relation to the Wrist-pin, substantially as specified.

In testimony that we claim the foregoing as our own We have hereto affixed our signatures in the presence of two witnesses.

h1 SAMUEL F. s FIELD.

marl: JUDSON PALMER, Witnesses:

PAUL C. Souris, Il. A. EOFF. 

